I had tried many different Gortex jackets and I was not impressed. The insides of those jackets were always wet with any high aerobic activity. I bought the Beta FL not expecting any big improvement. Wow, was I surprised. No more moisture on the inside of the jacket. The jacket is lightweight, has a nicer feel than other Gortex, and is much quieter (no crinkly sound). packs really small so it's easy to throw in my pack for a Cross Country Ski outing or a day hike. Even looks great around town.The small fits me perfectly - I'm 5' 11' & 145 lbs.Windproof, breathable, light, packs small, and a perfect fit. What more could I ask for.